Support structure



FIG. 1 is a perspective view of a support structure according to the disclosure;

FIG. 2 is a side view of a support structure according to the disclosure;

FIG. 3 is a front view of a support structure according to the disclosure;

FIG. 4 is a top view of a support structure according to the disclosure; and,

FIG. 5 is a bottom view of a support structure according to the disclosure.

The broken line portions shown on the drawing disclosure are for illustrative purposes only and form no part of the claimed design. 

CLAIM We claim the ornamental design for a support structure, as shown and described. 